FA!\ULY BACTERIACEAE 597 



Bacterium triloculare Ehrenberg. (Ehrenberg, IV. Evertebrata, Berlin, 1828, 

 8; Bacillus ehrenhergii Trevisan, I generi e le specie delle Batteriacee, 1899, 18; Bac- 

 terium ehrenbergii De Toni and Trevisan, in Saccardo, Sylloge Fungorum, 8, 1889, 

 1022; Bacterium lineola Cohn, Beitrjige z. Biol. d. Pflanzen, /, Heft 2, 1872, 170.) 

 Cohn also regards Vibrio lineola Miller, 1786 and Vibrio lineola {Bacillus lineola, 

 Bactrium lineola) of other authors as synonyms of Bacterium triloculare as explained 

 by Buchanan {Joe. cit., 213 and 521). PVom Latin tri, three and loculus, cells or 

 compartments. 



Key to the remaining species of genus Bacterium. 

 I. Gram-positive. 



A. Non -motile. 



1. Nitrites produced from nitrates. 



1. Bacterium erythrogenes. 



2. Bacterium subrufum. 



3. Bacterium linens. 



4. Bacterium mycoides. 



5. Bacterium, mutabile. 



6. Bacterium qualis. 



2. Nitrites not produced from nitrates. 



a. Grow on ordinary media. 



7. Bacterium racemosum. 



8. Bacterium healii. 



9. Bacterium insectiphilium. 



10. Bacterium tegumenticola . 



11. Bacterium minutaferula . 



12. Bacterium fulvum. 



aa. Grow only on sea water media on fresh isolation. 



13. Bacterium marinopiscosus. 



14. Bacterium sociovivum. 



15. Bacterium iinmotum. 



3. Action on nitrates unknown. 



16. Bacterium ammoniagcn.es . 



17. Bacterium minutissimum . 



B. Motile in young cultures. 



1. Nitrites not produced from nitrates. 



18. Bacterium incertum. 



19. Bacterium imperiale. 



C. Motile. Proteus-like growth on media. 

 1. Nitrites not produced from nitrates. 



20. Bacterium zopfii. 



21. Bacterium zenkeri. 



Appendixes I and II : These list 34 additional species of Gram-positive, motile 

 or non-motile, non-spore-forming, rod-shaped bacteria. See p. 609 and 612. 



II. Gram-negative. Digest cellulose. Do not digest agar. 

 A. Non-motile. Gelatin liquefied. Chromogenic. 

 1. Milk acid. 



22. Bacterium idoneum. 

 22a. Bacterium liquatum. 



